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Controlled precipitation
Author(s) -
Mersmann Alfons,
Angerhöfer Martin,
Franke Jürgen
Publication year - 1994
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270170102
Subject(s) - supersaturation , precipitation , nucleation , solubility equilibrium , solubility , crystal growth , particle size distribution , chemical engineering , materials science , crystal (programming language) , particle size , particle (ecology) , chemistry , mineralogy , crystallography , organic chemistry , geology , meteorology , physics , programming language , oceanography , computer science , engineering
Abstract In a process of precipitation, two or more reactants form a product. In many cases, the solubility of this product is very low and high supersaturation is generated which leads to nucleation and crystal growth. The number of the formed nuclei and their growth govern the particle size distribution of the precipitate. As a rule, the precipitate is separated from the mother liquor in a centrifuge or on a filter. This separation and the subsequent drying process of very fine particles can be very expensive with respect to investment and energy costs. Therefore, it is desirable to produce as coarse a precipitate as possible with a narrow crystal size distribution.